国际咨询工程师联合会(FIDIC)2005年年会中国·北京2005年9月4日--8日欢迎辞

世界工程咨询业的精英们将齐聚中国北京,参加国际咨询工程师联合会(FIDIC)2005年年会、成员协会代表大会和中国商机展示、推介、洽谈会.     

苯酚氧化法合成邻苯二酚

系统地介绍了邻苯二酚的合成方法，重点综述了苯酚氧化法合成邻苯二酚的研究进展．建议我国应尽快引进或开发国外已工业化的双氧水氧化技术生产邻苯二酚以满足国内市场对邻苯二酚的需求，而把研究工作放在沸石催化的双氧水氧化法和有机金属络合物或酶催化的空气液相氧化法，以赶上国际先进水平．     

生物无纺布反应器预处理黄河水的试验研究

利用自行研制的生物无纺布反应器对进入济南市鹊山水库一号泵站的黄河水进行了生物预处理试验研究。当水力负荷从2m3/(m2·h)增加到8m3/(m2·h)时,深入地探讨了生物无纺布对黄河水中的CODMn、NH4+-N、浊度、藻类、色度和SS的去除效果。试验结果表明,生物无纺布反应器能够有效地去除黄河水中的CODMn、NH4+-N等污染物质,是解决水源水微污染的有效预处理工艺。     

Long Crack R-Curve of Aligned Porous Silicon Nitride

Long crack R -curve of a porous Si₃N₄ with aligned fibrous grains was investigated, using a chevron-notched beam technique. A crack was constrained to propagate normal to the grain alignment. The crack growth resistance of aligned porous Si₃N₄ was much larger compared with that of dense Si₃N₄ ceramics. Microstructure observations showed that pullouts of fibrous grains in aligned porous Si₃N₄ markedly increased during crack propagation relative to those of dense Si₃N₄, due to the existence of pores. The efficient grain pullouts in porous Si₃N₄ increased the bridging stress at the crack wake.     

微生物诱导的矿化及其在油气工业的应用

微生物诱导的矿化沉淀是自然界中存在的一种普遍现象,并且碳酸盐沉淀是微生物诱导矿化的一种形式。微生物代谢活动所产生的碳酸盐沉淀,在二氧化碳封存、封堵大孔道来提高原油采收率方面具有重要的作用。常见的诱导碳酸盐沉淀的生物包括蓝藻,巴斯德孢子菌,硫酸盐还原菌,尿素分解菌,硝酸盐还原菌,产甲烷菌等,这些微生物诱导碳酸盐沉淀的潜在机理包括微生物的自身代谢活动改变沉淀环境,微生物菌体及胞外聚合物吸引离子来诱导沉淀。根据代谢类型不同,微生物诱导碳酸钙沉淀的作用类型以分为光合作用、硫酸盐还原、反硝化、氨化、甲烷氧化等。本文综述了自然条件下微生物诱导的碳酸盐沉淀的一些潜在机理,以及与沉淀过程相关的微生物的主要类型及其所处的自然环境,着重探究了微生物诱导的碳酸盐沉淀在石油工业的应用及这项技术所面临的挑战和未来展望。     

Iodothiocyanation/Nitration of Allenes with Potassium Thiocyanate/Silver Nitrite and Iodine

Direct strategies for the iodothiocyanation and iodonitration of allenes have been developed. In this process, potassium thiocyanate/silver nitrite and molecular iodine are used as the source of SCN, ONO₂ and iodine to provide the desired products in moderate to good yields with high stereoselectivity.

     

Microbial fuel cell-based sensor for Enterobacter sp. KBH6958 activity monitoring during hydrogen production: the effects of pH and glucose concentration

Journal of Applied Electrochemistry - A microbial fuel cell (MFC) is an electricity-generating device utilising electrochemically active microorganisms as biocatalysts. Using MFC as a biosensor to...     

干涉配合紧固件的应力波安装法

用应力波安装干涉配合紧固件的原理，对３０ＣｒＭｎＳｉＡ钢紧固件进行了安装试验，并对安装后的螺栓作了疲试验，分析了安装损伤和应力波安装法的影响因素。     

Thermal Shock Behavior of Porous Silicon Carbide Ceramics

Using the water-quenching technique, the thermal shock behavior of porous silicon carbide (SiC) ceramics was evaluated as a function of quenching temperature, quenching cycles, and specimen thickness. It is shown that the residual strength of the quenched specimens decreases gradually with increases in the quenching temperature and specimen thickness. Moreover, it was found that the fracture strength of the quenched specimens was not affected by the increase of quenching cycles. This suggests a potential advantage of porous SiC ceramics for cyclic thermal-shock applications.